Overpressured emission-line clouds in the haloes of powerful radio galaxies

Details Overpressured emission-line clouds in the haloes of powerful radio galaxies Overpressured emission-line clouds in the haloes of powerful radio galaxies

Mar 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002mnras.331l..13r&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 331, Issue 2, pp. L13-L18.

Astronomy and Astrophysics

Astronomy

4

Galaxies: Active, Galaxies: Haloes, Galaxies: Ism

Scientific paper

We present accurate measurements of the physical conditions in five powerful radio galaxies, as derived from deep, long-slit spectroscopic observations. All five objects show prominent extended line emission, and have X-ray luminosities similar to those of isolated elliptical galaxies. The data are high enough quality that the electron density and temperature can be measured at several positions across the emission-line nebulae. We subtract a model continuum comprising a combination of a 15-Gyr stellar template, a young stellar template and a power law, so as to be better able to measure faint diagnostic lines. Electron temperatures measured from the [OIII](4959+5007)/4363 line ratio are in the range 10000

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